1use crate::{
2 ProjectItem as _, ProjectPath,
3 lsp_store::OpenLspBufferHandle,
4 search::SearchQuery,
5 worktree_store::{WorktreeStore, WorktreeStoreEvent},
6};
7use anyhow::{Context as _, Result, anyhow};
8use client::Client;
9use collections::{HashMap, HashSet, hash_map};
10use fs::Fs;
11use futures::{Future, FutureExt as _, StreamExt, channel::oneshot, future::Shared};
12use gpui::{
13 App, AppContext as _, AsyncApp, Context, Entity, EventEmitter, Subscription, Task, WeakEntity,
14};
15use language::{
16 Buffer, BufferEvent, Capability, DiskState, File as _, Language, Operation,
17 proto::{
18 deserialize_line_ending, deserialize_version, serialize_line_ending, serialize_version,
19 split_operations,
20 },
21};
22use rpc::{
23 AnyProtoClient, ErrorExt as _, TypedEnvelope,
24 proto::{self, ToProto},
25};
26use smol::channel::Receiver;
27use std::{io, path::Path, pin::pin, sync::Arc, time::Instant};
28use text::BufferId;
29use util::{ResultExt as _, TryFutureExt, debug_panic, maybe};
30use worktree::{File, PathChange, ProjectEntryId, Worktree, WorktreeId};
31
32/// A set of open buffers.
33pub struct BufferStore {
34 state: BufferStoreState,
35 #[allow(clippy::type_complexity)]
36 loading_buffers: HashMap<ProjectPath, Shared<Task<Result<Entity<Buffer>, Arc<anyhow::Error>>>>>,
37 worktree_store: Entity<WorktreeStore>,
38 opened_buffers: HashMap<BufferId, OpenBuffer>,
39 downstream_client: Option<(AnyProtoClient, u64)>,
40 shared_buffers: HashMap<proto::PeerId, HashMap<BufferId, SharedBuffer>>,
41}
42
43#[derive(Hash, Eq, PartialEq, Clone)]
44struct SharedBuffer {
45 buffer: Entity<Buffer>,
46 lsp_handle: Option<OpenLspBufferHandle>,
47}
48
49enum BufferStoreState {
50 Local(LocalBufferStore),
51 Remote(RemoteBufferStore),
52}
53
54struct RemoteBufferStore {
55 shared_with_me: HashSet<Entity<Buffer>>,
56 upstream_client: AnyProtoClient,
57 project_id: u64,
58 loading_remote_buffers_by_id: HashMap<BufferId, Entity<Buffer>>,
59 remote_buffer_listeners:
60 HashMap<BufferId, Vec<oneshot::Sender<Result<Entity<Buffer>, anyhow::Error>>>>,
61 worktree_store: Entity<WorktreeStore>,
62}
63
64struct LocalBufferStore {
65 local_buffer_ids_by_path: HashMap<ProjectPath, BufferId>,
66 local_buffer_ids_by_entry_id: HashMap<ProjectEntryId, BufferId>,
67 worktree_store: Entity<WorktreeStore>,
68 _subscription: Subscription,
69}
70
71enum OpenBuffer {
72 Complete { buffer: WeakEntity<Buffer> },
73 Operations(Vec<Operation>),
74}
75
76pub enum BufferStoreEvent {
77 BufferAdded(Entity<Buffer>),
78 BufferOpened {
79 buffer: Entity<Buffer>,
80 project_path: ProjectPath,
81 },
82 SharedBufferClosed(proto::PeerId, BufferId),
83 BufferDropped(BufferId),
84 BufferChangedFilePath {
85 buffer: Entity<Buffer>,
86 old_file: Option<Arc<dyn language::File>>,
87 },
88}
89
90#[derive(Default, Debug)]
91pub struct ProjectTransaction(pub HashMap<Entity<Buffer>, language::Transaction>);
92
93impl EventEmitter<BufferStoreEvent> for BufferStore {}
94
95impl RemoteBufferStore {
96 pub fn wait_for_remote_buffer(
97 &mut self,
98 id: BufferId,
99 cx: &mut Context<BufferStore>,
100 ) -> Task<Result<Entity<Buffer>>> {
101 let (tx, rx) = oneshot::channel();
102 self.remote_buffer_listeners.entry(id).or_default().push(tx);
103
104 cx.spawn(async move |this, cx| {
105 if let Some(buffer) = this
106 .read_with(cx, |buffer_store, _| buffer_store.get(id))
107 .ok()
108 .flatten()
109 {
110 return Ok(buffer);
111 }
112
113 cx.background_spawn(async move { rx.await? }).await
114 })
115 }
116
117 fn save_remote_buffer(
118 &self,
119 buffer_handle: Entity<Buffer>,
120 new_path: Option<proto::ProjectPath>,
121 cx: &Context<BufferStore>,
122 ) -> Task<Result<()>> {
123 let buffer = buffer_handle.read(cx);
124 let buffer_id = buffer.remote_id().into();
125 let version = buffer.version();
126 let rpc = self.upstream_client.clone();
127 let project_id = self.project_id;
128 cx.spawn(async move |_, cx| {
129 let response = rpc
130 .request(proto::SaveBuffer {
131 project_id,
132 buffer_id,
133 new_path,
134 version: serialize_version(&version),
135 })
136 .await?;
137 let version = deserialize_version(&response.version);
138 let mtime = response.mtime.map(|mtime| mtime.into());
139
140 buffer_handle.update(cx, |buffer, cx| {
141 buffer.did_save(version.clone(), mtime, cx);
142 })?;
143
144 Ok(())
145 })
146 }
147
148 pub fn handle_create_buffer_for_peer(
149 &mut self,
150 envelope: TypedEnvelope<proto::CreateBufferForPeer>,
151 replica_id: u16,
152 capability: Capability,
153 cx: &mut Context<BufferStore>,
154 ) -> Result<Option<Entity<Buffer>>> {
155 match envelope
156 .payload
157 .variant
158 .ok_or_else(|| anyhow!("missing variant"))?
159 {
160 proto::create_buffer_for_peer::Variant::State(mut state) => {
161 let buffer_id = BufferId::new(state.id)?;
162
163 let buffer_result = maybe!({
164 let mut buffer_file = None;
165 if let Some(file) = state.file.take() {
166 let worktree_id = worktree::WorktreeId::from_proto(file.worktree_id);
167 let worktree = self
168 .worktree_store
169 .read(cx)
170 .worktree_for_id(worktree_id, cx)
171 .ok_or_else(|| {
172 anyhow!("no worktree found for id {}", file.worktree_id)
173 })?;
174 buffer_file = Some(Arc::new(File::from_proto(file, worktree.clone(), cx)?)
175 as Arc<dyn language::File>);
176 }
177 Buffer::from_proto(replica_id, capability, state, buffer_file)
178 });
179
180 match buffer_result {
181 Ok(buffer) => {
182 let buffer = cx.new(|_| buffer);
183 self.loading_remote_buffers_by_id.insert(buffer_id, buffer);
184 }
185 Err(error) => {
186 if let Some(listeners) = self.remote_buffer_listeners.remove(&buffer_id) {
187 for listener in listeners {
188 listener.send(Err(anyhow!(error.cloned()))).ok();
189 }
190 }
191 }
192 }
193 }
194 proto::create_buffer_for_peer::Variant::Chunk(chunk) => {
195 let buffer_id = BufferId::new(chunk.buffer_id)?;
196 let buffer = self
197 .loading_remote_buffers_by_id
198 .get(&buffer_id)
199 .cloned()
200 .ok_or_else(|| {
201 anyhow!(
202 "received chunk for buffer {} without initial state",
203 chunk.buffer_id
204 )
205 })?;
206
207 let result = maybe!({
208 let operations = chunk
209 .operations
210 .into_iter()
211 .map(language::proto::deserialize_operation)
212 .collect::<Result<Vec<_>>>()?;
213 buffer.update(cx, |buffer, cx| buffer.apply_ops(operations, cx));
214 anyhow::Ok(())
215 });
216
217 if let Err(error) = result {
218 self.loading_remote_buffers_by_id.remove(&buffer_id);
219 if let Some(listeners) = self.remote_buffer_listeners.remove(&buffer_id) {
220 for listener in listeners {
221 listener.send(Err(error.cloned())).ok();
222 }
223 }
224 } else if chunk.is_last {
225 self.loading_remote_buffers_by_id.remove(&buffer_id);
226 if self.upstream_client.is_via_collab() {
227 // retain buffers sent by peers to avoid races.
228 self.shared_with_me.insert(buffer.clone());
229 }
230
231 if let Some(senders) = self.remote_buffer_listeners.remove(&buffer_id) {
232 for sender in senders {
233 sender.send(Ok(buffer.clone())).ok();
234 }
235 }
236 return Ok(Some(buffer));
237 }
238 }
239 }
240 return Ok(None);
241 }
242
243 pub fn incomplete_buffer_ids(&self) -> Vec<BufferId> {
244 self.loading_remote_buffers_by_id
245 .keys()
246 .copied()
247 .collect::<Vec<_>>()
248 }
249
250 pub fn deserialize_project_transaction(
251 &self,
252 message: proto::ProjectTransaction,
253 push_to_history: bool,
254 cx: &mut Context<BufferStore>,
255 ) -> Task<Result<ProjectTransaction>> {
256 cx.spawn(async move |this, cx| {
257 let mut project_transaction = ProjectTransaction::default();
258 for (buffer_id, transaction) in message.buffer_ids.into_iter().zip(message.transactions)
259 {
260 let buffer_id = BufferId::new(buffer_id)?;
261 let buffer = this
262 .update(cx, |this, cx| this.wait_for_remote_buffer(buffer_id, cx))?
263 .await?;
264 let transaction = language::proto::deserialize_transaction(transaction)?;
265 project_transaction.0.insert(buffer, transaction);
266 }
267
268 for (buffer, transaction) in &project_transaction.0 {
269 buffer
270 .update(cx, |buffer, _| {
271 buffer.wait_for_edits(transaction.edit_ids.iter().copied())
272 })?
273 .await?;
274
275 if push_to_history {
276 buffer.update(cx, |buffer, _| {
277 buffer.push_transaction(transaction.clone(), Instant::now());
278 })?;
279 }
280 }
281
282 Ok(project_transaction)
283 })
284 }
285
286 fn open_buffer(
287 &self,
288 path: Arc<Path>,
289 worktree: Entity<Worktree>,
290 cx: &mut Context<BufferStore>,
291 ) -> Task<Result<Entity<Buffer>>> {
292 let worktree_id = worktree.read(cx).id().to_proto();
293 let project_id = self.project_id;
294 let client = self.upstream_client.clone();
295 cx.spawn(async move |this, cx| {
296 let response = client
297 .request(proto::OpenBufferByPath {
298 project_id,
299 worktree_id,
300 path: path.to_proto(),
301 })
302 .await?;
303 let buffer_id = BufferId::new(response.buffer_id)?;
304
305 let buffer = this
306 .update(cx, {
307 |this, cx| this.wait_for_remote_buffer(buffer_id, cx)
308 })?
309 .await?;
310
311 Ok(buffer)
312 })
313 }
314
315 fn create_buffer(&self, cx: &mut Context<BufferStore>) -> Task<Result<Entity<Buffer>>> {
316 let create = self.upstream_client.request(proto::OpenNewBuffer {
317 project_id: self.project_id,
318 });
319 cx.spawn(async move |this, cx| {
320 let response = create.await?;
321 let buffer_id = BufferId::new(response.buffer_id)?;
322
323 this.update(cx, |this, cx| this.wait_for_remote_buffer(buffer_id, cx))?
324 .await
325 })
326 }
327
328 fn reload_buffers(
329 &self,
330 buffers: HashSet<Entity<Buffer>>,
331 push_to_history: bool,
332 cx: &mut Context<BufferStore>,
333 ) -> Task<Result<ProjectTransaction>> {
334 let request = self.upstream_client.request(proto::ReloadBuffers {
335 project_id: self.project_id,
336 buffer_ids: buffers
337 .iter()
338 .map(|buffer| buffer.read(cx).remote_id().to_proto())
339 .collect(),
340 });
341
342 cx.spawn(async move |this, cx| {
343 let response = request
344 .await?
345 .transaction
346 .ok_or_else(|| anyhow!("missing transaction"))?;
347 this.update(cx, |this, cx| {
348 this.deserialize_project_transaction(response, push_to_history, cx)
349 })?
350 .await
351 })
352 }
353}
354
355impl LocalBufferStore {
356 fn save_local_buffer(
357 &self,
358 buffer_handle: Entity<Buffer>,
359 worktree: Entity<Worktree>,
360 path: Arc<Path>,
361 mut has_changed_file: bool,
362 cx: &mut Context<BufferStore>,
363 ) -> Task<Result<()>> {
364 let buffer = buffer_handle.read(cx);
365
366 let text = buffer.as_rope().clone();
367 let line_ending = buffer.line_ending();
368 let version = buffer.version();
369 let buffer_id = buffer.remote_id();
370 if buffer
371 .file()
372 .is_some_and(|file| file.disk_state() == DiskState::New)
373 {
374 has_changed_file = true;
375 }
376
377 let save = worktree.update(cx, |worktree, cx| {
378 worktree.write_file(path.as_ref(), text, line_ending, cx)
379 });
380
381 cx.spawn(async move |this, cx| {
382 let new_file = save.await?;
383 let mtime = new_file.disk_state().mtime();
384 this.update(cx, |this, cx| {
385 if let Some((downstream_client, project_id)) = this.downstream_client.clone() {
386 if has_changed_file {
387 downstream_client
388 .send(proto::UpdateBufferFile {
389 project_id,
390 buffer_id: buffer_id.to_proto(),
391 file: Some(language::File::to_proto(&*new_file, cx)),
392 })
393 .log_err();
394 }
395 downstream_client
396 .send(proto::BufferSaved {
397 project_id,
398 buffer_id: buffer_id.to_proto(),
399 version: serialize_version(&version),
400 mtime: mtime.map(|time| time.into()),
401 })
402 .log_err();
403 }
404 })?;
405 buffer_handle.update(cx, |buffer, cx| {
406 if has_changed_file {
407 buffer.file_updated(new_file, cx);
408 }
409 buffer.did_save(version.clone(), mtime, cx);
410 })
411 })
412 }
413
414 fn subscribe_to_worktree(
415 &mut self,
416 worktree: &Entity<Worktree>,
417 cx: &mut Context<BufferStore>,
418 ) {
419 cx.subscribe(worktree, |this, worktree, event, cx| {
420 if worktree.read(cx).is_local() {
421 match event {
422 worktree::Event::UpdatedEntries(changes) => {
423 Self::local_worktree_entries_changed(this, &worktree, changes, cx);
424 }
425 _ => {}
426 }
427 }
428 })
429 .detach();
430 }
431
432 fn local_worktree_entries_changed(
433 this: &mut BufferStore,
434 worktree_handle: &Entity<Worktree>,
435 changes: &[(Arc<Path>, ProjectEntryId, PathChange)],
436 cx: &mut Context<BufferStore>,
437 ) {
438 let snapshot = worktree_handle.read(cx).snapshot();
439 for (path, entry_id, _) in changes {
440 Self::local_worktree_entry_changed(
441 this,
442 *entry_id,
443 path,
444 worktree_handle,
445 &snapshot,
446 cx,
447 );
448 }
449 }
450
451 fn local_worktree_entry_changed(
452 this: &mut BufferStore,
453 entry_id: ProjectEntryId,
454 path: &Arc<Path>,
455 worktree: &Entity<worktree::Worktree>,
456 snapshot: &worktree::Snapshot,
457 cx: &mut Context<BufferStore>,
458 ) -> Option<()> {
459 let project_path = ProjectPath {
460 worktree_id: snapshot.id(),
461 path: path.clone(),
462 };
463
464 let buffer_id = {
465 let local = this.as_local_mut()?;
466 match local.local_buffer_ids_by_entry_id.get(&entry_id) {
467 Some(&buffer_id) => buffer_id,
468 None => local.local_buffer_ids_by_path.get(&project_path).copied()?,
469 }
470 };
471
472 let buffer = if let Some(buffer) = this.get(buffer_id) {
473 Some(buffer)
474 } else {
475 this.opened_buffers.remove(&buffer_id);
476 None
477 };
478
479 let buffer = if let Some(buffer) = buffer {
480 buffer
481 } else {
482 let this = this.as_local_mut()?;
483 this.local_buffer_ids_by_path.remove(&project_path);
484 this.local_buffer_ids_by_entry_id.remove(&entry_id);
485 return None;
486 };
487
488 let events = buffer.update(cx, |buffer, cx| {
489 let local = this.as_local_mut()?;
490 let file = buffer.file()?;
491 let old_file = File::from_dyn(Some(file))?;
492 if old_file.worktree != *worktree {
493 return None;
494 }
495
496 let snapshot_entry = old_file
497 .entry_id
498 .and_then(|entry_id| snapshot.entry_for_id(entry_id))
499 .or_else(|| snapshot.entry_for_path(old_file.path.as_ref()));
500
501 let new_file = if let Some(entry) = snapshot_entry {
502 File {
503 disk_state: match entry.mtime {
504 Some(mtime) => DiskState::Present { mtime },
505 None => old_file.disk_state,
506 },
507 is_local: true,
508 entry_id: Some(entry.id),
509 path: entry.path.clone(),
510 worktree: worktree.clone(),
511 is_private: entry.is_private,
512 }
513 } else {
514 File {
515 disk_state: DiskState::Deleted,
516 is_local: true,
517 entry_id: old_file.entry_id,
518 path: old_file.path.clone(),
519 worktree: worktree.clone(),
520 is_private: old_file.is_private,
521 }
522 };
523
524 if new_file == *old_file {
525 return None;
526 }
527
528 let mut events = Vec::new();
529 if new_file.path != old_file.path {
530 local.local_buffer_ids_by_path.remove(&ProjectPath {
531 path: old_file.path.clone(),
532 worktree_id: old_file.worktree_id(cx),
533 });
534 local.local_buffer_ids_by_path.insert(
535 ProjectPath {
536 worktree_id: new_file.worktree_id(cx),
537 path: new_file.path.clone(),
538 },
539 buffer_id,
540 );
541 events.push(BufferStoreEvent::BufferChangedFilePath {
542 buffer: cx.entity(),
543 old_file: buffer.file().cloned(),
544 });
545 }
546
547 if new_file.entry_id != old_file.entry_id {
548 if let Some(entry_id) = old_file.entry_id {
549 local.local_buffer_ids_by_entry_id.remove(&entry_id);
550 }
551 if let Some(entry_id) = new_file.entry_id {
552 local
553 .local_buffer_ids_by_entry_id
554 .insert(entry_id, buffer_id);
555 }
556 }
557
558 if let Some((client, project_id)) = &this.downstream_client {
559 client
560 .send(proto::UpdateBufferFile {
561 project_id: *project_id,
562 buffer_id: buffer_id.to_proto(),
563 file: Some(new_file.to_proto(cx)),
564 })
565 .ok();
566 }
567
568 buffer.file_updated(Arc::new(new_file), cx);
569 Some(events)
570 })?;
571
572 for event in events {
573 cx.emit(event);
574 }
575
576 None
577 }
578
579 fn buffer_changed_file(&mut self, buffer: Entity<Buffer>, cx: &mut App) -> Option<()> {
580 let file = File::from_dyn(buffer.read(cx).file())?;
581
582 let remote_id = buffer.read(cx).remote_id();
583 if let Some(entry_id) = file.entry_id {
584 match self.local_buffer_ids_by_entry_id.get(&entry_id) {
585 Some(_) => {
586 return None;
587 }
588 None => {
589 self.local_buffer_ids_by_entry_id
590 .insert(entry_id, remote_id);
591 }
592 }
593 };
594 self.local_buffer_ids_by_path.insert(
595 ProjectPath {
596 worktree_id: file.worktree_id(cx),
597 path: file.path.clone(),
598 },
599 remote_id,
600 );
601
602 Some(())
603 }
604
605 fn save_buffer(
606 &self,
607 buffer: Entity<Buffer>,
608 cx: &mut Context<BufferStore>,
609 ) -> Task<Result<()>> {
610 let Some(file) = File::from_dyn(buffer.read(cx).file()) else {
611 return Task::ready(Err(anyhow!("buffer doesn't have a file")));
612 };
613 let worktree = file.worktree.clone();
614 self.save_local_buffer(buffer, worktree, file.path.clone(), false, cx)
615 }
616
617 fn save_buffer_as(
618 &self,
619 buffer: Entity<Buffer>,
620 path: ProjectPath,
621 cx: &mut Context<BufferStore>,
622 ) -> Task<Result<()>> {
623 let Some(worktree) = self
624 .worktree_store
625 .read(cx)
626 .worktree_for_id(path.worktree_id, cx)
627 else {
628 return Task::ready(Err(anyhow!("no such worktree")));
629 };
630 self.save_local_buffer(buffer, worktree, path.path.clone(), true, cx)
631 }
632
633 fn open_buffer(
634 &self,
635 path: Arc<Path>,
636 worktree: Entity<Worktree>,
637 cx: &mut Context<BufferStore>,
638 ) -> Task<Result<Entity<Buffer>>> {
639 let load_buffer = worktree.update(cx, |worktree, cx| {
640 let load_file = worktree.load_file(path.as_ref(), cx);
641 let reservation = cx.reserve_entity();
642 let buffer_id = BufferId::from(reservation.entity_id().as_non_zero_u64());
643 cx.spawn(async move |_, cx| {
644 let loaded = load_file.await?;
645 let text_buffer = cx
646 .background_spawn(async move { text::Buffer::new(0, buffer_id, loaded.text) })
647 .await;
648 cx.insert_entity(reservation, |_| {
649 Buffer::build(text_buffer, Some(loaded.file), Capability::ReadWrite)
650 })
651 })
652 });
653
654 cx.spawn(async move |this, cx| {
655 let buffer = match load_buffer.await {
656 Ok(buffer) => Ok(buffer),
657 Err(error) if is_not_found_error(&error) => cx.new(|cx| {
658 let buffer_id = BufferId::from(cx.entity_id().as_non_zero_u64());
659 let text_buffer = text::Buffer::new(0, buffer_id, "".into());
660 Buffer::build(
661 text_buffer,
662 Some(Arc::new(File {
663 worktree,
664 path,
665 disk_state: DiskState::New,
666 entry_id: None,
667 is_local: true,
668 is_private: false,
669 })),
670 Capability::ReadWrite,
671 )
672 }),
673 Err(e) => Err(e),
674 }?;
675 this.update(cx, |this, cx| {
676 this.add_buffer(buffer.clone(), cx)?;
677 let buffer_id = buffer.read(cx).remote_id();
678 if let Some(file) = File::from_dyn(buffer.read(cx).file()) {
679 let this = this.as_local_mut().unwrap();
680 this.local_buffer_ids_by_path.insert(
681 ProjectPath {
682 worktree_id: file.worktree_id(cx),
683 path: file.path.clone(),
684 },
685 buffer_id,
686 );
687
688 if let Some(entry_id) = file.entry_id {
689 this.local_buffer_ids_by_entry_id
690 .insert(entry_id, buffer_id);
691 }
692 }
693
694 anyhow::Ok(())
695 })??;
696
697 Ok(buffer)
698 })
699 }
700
701 fn create_buffer(&self, cx: &mut Context<BufferStore>) -> Task<Result<Entity<Buffer>>> {
702 cx.spawn(async move |buffer_store, cx| {
703 let buffer =
704 cx.new(|cx| Buffer::local("", cx).with_language(language::PLAIN_TEXT.clone(), cx))?;
705 buffer_store.update(cx, |buffer_store, cx| {
706 buffer_store.add_buffer(buffer.clone(), cx).log_err();
707 })?;
708 Ok(buffer)
709 })
710 }
711
712 fn reload_buffers(
713 &self,
714 buffers: HashSet<Entity<Buffer>>,
715 push_to_history: bool,
716 cx: &mut Context<BufferStore>,
717 ) -> Task<Result<ProjectTransaction>> {
718 cx.spawn(async move |_, cx| {
719 let mut project_transaction = ProjectTransaction::default();
720 for buffer in buffers {
721 let transaction = buffer.update(cx, |buffer, cx| buffer.reload(cx))?.await?;
722 buffer.update(cx, |buffer, cx| {
723 if let Some(transaction) = transaction {
724 if !push_to_history {
725 buffer.forget_transaction(transaction.id);
726 }
727 project_transaction.0.insert(cx.entity(), transaction);
728 }
729 })?;
730 }
731
732 Ok(project_transaction)
733 })
734 }
735}
736
737impl BufferStore {
738 pub fn init(client: &AnyProtoClient) {
739 client.add_entity_message_handler(Self::handle_buffer_reloaded);
740 client.add_entity_message_handler(Self::handle_buffer_saved);
741 client.add_entity_message_handler(Self::handle_update_buffer_file);
742 client.add_entity_request_handler(Self::handle_save_buffer);
743 client.add_entity_request_handler(Self::handle_reload_buffers);
744 }
745
746 /// Creates a buffer store, optionally retaining its buffers.
747 pub fn local(worktree_store: Entity<WorktreeStore>, cx: &mut Context<Self>) -> Self {
748 Self {
749 state: BufferStoreState::Local(LocalBufferStore {
750 local_buffer_ids_by_path: Default::default(),
751 local_buffer_ids_by_entry_id: Default::default(),
752 worktree_store: worktree_store.clone(),
753 _subscription: cx.subscribe(&worktree_store, |this, _, event, cx| {
754 if let WorktreeStoreEvent::WorktreeAdded(worktree) = event {
755 let this = this.as_local_mut().unwrap();
756 this.subscribe_to_worktree(worktree, cx);
757 }
758 }),
759 }),
760 downstream_client: None,
761 opened_buffers: Default::default(),
762 shared_buffers: Default::default(),
763 loading_buffers: Default::default(),
764 worktree_store,
765 }
766 }
767
768 pub fn remote(
769 worktree_store: Entity<WorktreeStore>,
770 upstream_client: AnyProtoClient,
771 remote_id: u64,
772 _cx: &mut Context<Self>,
773 ) -> Self {
774 Self {
775 state: BufferStoreState::Remote(RemoteBufferStore {
776 shared_with_me: Default::default(),
777 loading_remote_buffers_by_id: Default::default(),
778 remote_buffer_listeners: Default::default(),
779 project_id: remote_id,
780 upstream_client,
781 worktree_store: worktree_store.clone(),
782 }),
783 downstream_client: None,
784 opened_buffers: Default::default(),
785 loading_buffers: Default::default(),
786 shared_buffers: Default::default(),
787 worktree_store,
788 }
789 }
790
791 fn as_local(&self) -> Option<&LocalBufferStore> {
792 match &self.state {
793 BufferStoreState::Local(state) => Some(state),
794 _ => None,
795 }
796 }
797
798 fn as_local_mut(&mut self) -> Option<&mut LocalBufferStore> {
799 match &mut self.state {
800 BufferStoreState::Local(state) => Some(state),
801 _ => None,
802 }
803 }
804
805 fn as_remote_mut(&mut self) -> Option<&mut RemoteBufferStore> {
806 match &mut self.state {
807 BufferStoreState::Remote(state) => Some(state),
808 _ => None,
809 }
810 }
811
812 fn as_remote(&self) -> Option<&RemoteBufferStore> {
813 match &self.state {
814 BufferStoreState::Remote(state) => Some(state),
815 _ => None,
816 }
817 }
818
819 pub fn open_buffer(
820 &mut self,
821 project_path: ProjectPath,
822 cx: &mut Context<Self>,
823 ) -> Task<Result<Entity<Buffer>>> {
824 if let Some(buffer) = self.get_by_path(&project_path, cx) {
825 cx.emit(BufferStoreEvent::BufferOpened {
826 buffer: buffer.clone(),
827 project_path,
828 });
829
830 return Task::ready(Ok(buffer));
831 }
832
833 let task = match self.loading_buffers.entry(project_path.clone()) {
834 hash_map::Entry::Occupied(e) => e.get().clone(),
835 hash_map::Entry::Vacant(entry) => {
836 let path = project_path.path.clone();
837 let Some(worktree) = self
838 .worktree_store
839 .read(cx)
840 .worktree_for_id(project_path.worktree_id, cx)
841 else {
842 return Task::ready(Err(anyhow!("no such worktree")));
843 };
844 let load_buffer = match &self.state {
845 BufferStoreState::Local(this) => this.open_buffer(path, worktree, cx),
846 BufferStoreState::Remote(this) => this.open_buffer(path, worktree, cx),
847 };
848
849 entry
850 .insert(
851 cx.spawn(async move |this, cx| {
852 let load_result = load_buffer.await;
853 this.update(cx, |this, cx| {
854 // Record the fact that the buffer is no longer loading.
855 this.loading_buffers.remove(&project_path);
856
857 let buffer = load_result.map_err(Arc::new)?;
858 cx.emit(BufferStoreEvent::BufferOpened {
859 buffer: buffer.clone(),
860 project_path,
861 });
862
863 Ok(buffer)
864 })?
865 })
866 .shared(),
867 )
868 .clone()
869 }
870 };
871
872 cx.background_spawn(async move { task.await.map_err(|e| anyhow!("{e}")) })
873 }
874
875 pub(crate) fn worktree_for_buffer(
876 &self,
877 buffer: &Entity<Buffer>,
878 cx: &App,
879 ) -> Option<(Entity<Worktree>, Arc<Path>)> {
880 let file = buffer.read(cx).file()?;
881 let worktree_id = file.worktree_id(cx);
882 let path = file.path().clone();
883 let worktree = self
884 .worktree_store
885 .read(cx)
886 .worktree_for_id(worktree_id, cx)?;
887 Some((worktree, path))
888 }
889
890 pub fn create_buffer(&mut self, cx: &mut Context<Self>) -> Task<Result<Entity<Buffer>>> {
891 match &self.state {
892 BufferStoreState::Local(this) => this.create_buffer(cx),
893 BufferStoreState::Remote(this) => this.create_buffer(cx),
894 }
895 }
896
897 pub fn save_buffer(
898 &mut self,
899 buffer: Entity<Buffer>,
900 cx: &mut Context<Self>,
901 ) -> Task<Result<()>> {
902 match &mut self.state {
903 BufferStoreState::Local(this) => this.save_buffer(buffer, cx),
904 BufferStoreState::Remote(this) => this.save_remote_buffer(buffer.clone(), None, cx),
905 }
906 }
907
908 pub fn save_buffer_as(
909 &mut self,
910 buffer: Entity<Buffer>,
911 path: ProjectPath,
912 cx: &mut Context<Self>,
913 ) -> Task<Result<()>> {
914 let old_file = buffer.read(cx).file().cloned();
915 let task = match &self.state {
916 BufferStoreState::Local(this) => this.save_buffer_as(buffer.clone(), path, cx),
917 BufferStoreState::Remote(this) => {
918 this.save_remote_buffer(buffer.clone(), Some(path.to_proto()), cx)
919 }
920 };
921 cx.spawn(async move |this, cx| {
922 task.await?;
923 this.update(cx, |_, cx| {
924 cx.emit(BufferStoreEvent::BufferChangedFilePath { buffer, old_file });
925 })
926 })
927 }
928
929 fn add_buffer(&mut self, buffer_entity: Entity<Buffer>, cx: &mut Context<Self>) -> Result<()> {
930 let buffer = buffer_entity.read(cx);
931 let remote_id = buffer.remote_id();
932 let is_remote = buffer.replica_id() != 0;
933 let open_buffer = OpenBuffer::Complete {
934 buffer: buffer_entity.downgrade(),
935 };
936
937 let handle = cx.entity().downgrade();
938 buffer_entity.update(cx, move |_, cx| {
939 cx.on_release(move |buffer, cx| {
940 handle
941 .update(cx, |_, cx| {
942 cx.emit(BufferStoreEvent::BufferDropped(buffer.remote_id()))
943 })
944 .ok();
945 })
946 .detach()
947 });
948
949 match self.opened_buffers.entry(remote_id) {
950 hash_map::Entry::Vacant(entry) => {
951 entry.insert(open_buffer);
952 }
953 hash_map::Entry::Occupied(mut entry) => {
954 if let OpenBuffer::Operations(operations) = entry.get_mut() {
955 buffer_entity.update(cx, |b, cx| b.apply_ops(operations.drain(..), cx));
956 } else if entry.get().upgrade().is_some() {
957 if is_remote {
958 return Ok(());
959 } else {
960 debug_panic!("buffer {} was already registered", remote_id);
961 Err(anyhow!("buffer {} was already registered", remote_id))?;
962 }
963 }
964 entry.insert(open_buffer);
965 }
966 }
967
968 cx.subscribe(&buffer_entity, Self::on_buffer_event).detach();
969 cx.emit(BufferStoreEvent::BufferAdded(buffer_entity));
970 Ok(())
971 }
972
973 pub fn buffers(&self) -> impl '_ + Iterator<Item = Entity<Buffer>> {
974 self.opened_buffers
975 .values()
976 .filter_map(|buffer| buffer.upgrade())
977 }
978
979 pub fn loading_buffers(
980 &self,
981 ) -> impl Iterator<Item = (&ProjectPath, impl Future<Output = Result<Entity<Buffer>>>)> {
982 self.loading_buffers.iter().map(|(path, task)| {
983 let task = task.clone();
984 (path, async move { task.await.map_err(|e| anyhow!("{e}")) })
985 })
986 }
987
988 pub fn buffer_id_for_project_path(&self, project_path: &ProjectPath) -> Option<&BufferId> {
989 self.as_local()
990 .and_then(|state| state.local_buffer_ids_by_path.get(project_path))
991 }
992
993 pub fn get_by_path(&self, path: &ProjectPath, cx: &App) -> Option<Entity<Buffer>> {
994 self.buffers().find_map(|buffer| {
995 let file = File::from_dyn(buffer.read(cx).file())?;
996 if file.worktree_id(cx) == path.worktree_id && file.path == path.path {
997 Some(buffer)
998 } else {
999 None
1000 }
1001 })
1002 }
1003
1004 pub fn get(&self, buffer_id: BufferId) -> Option<Entity<Buffer>> {
1005 self.opened_buffers.get(&buffer_id)?.upgrade()
1006 }
1007
1008 pub fn get_existing(&self, buffer_id: BufferId) -> Result<Entity<Buffer>> {
1009 self.get(buffer_id)
1010 .ok_or_else(|| anyhow!("unknown buffer id {}", buffer_id))
1011 }
1012
1013 pub fn get_possibly_incomplete(&self, buffer_id: BufferId) -> Option<Entity<Buffer>> {
1014 self.get(buffer_id).or_else(|| {
1015 self.as_remote()
1016 .and_then(|remote| remote.loading_remote_buffers_by_id.get(&buffer_id).cloned())
1017 })
1018 }
1019
1020 pub fn buffer_version_info(&self, cx: &App) -> (Vec<proto::BufferVersion>, Vec<BufferId>) {
1021 let buffers = self
1022 .buffers()
1023 .map(|buffer| {
1024 let buffer = buffer.read(cx);
1025 proto::BufferVersion {
1026 id: buffer.remote_id().into(),
1027 version: language::proto::serialize_version(&buffer.version),
1028 }
1029 })
1030 .collect();
1031 let incomplete_buffer_ids = self
1032 .as_remote()
1033 .map(|remote| remote.incomplete_buffer_ids())
1034 .unwrap_or_default();
1035 (buffers, incomplete_buffer_ids)
1036 }
1037
1038 pub fn disconnected_from_host(&mut self, cx: &mut App) {
1039 for open_buffer in self.opened_buffers.values_mut() {
1040 if let Some(buffer) = open_buffer.upgrade() {
1041 buffer.update(cx, |buffer, _| buffer.give_up_waiting());
1042 }
1043 }
1044
1045 for buffer in self.buffers() {
1046 buffer.update(cx, |buffer, cx| {
1047 buffer.set_capability(Capability::ReadOnly, cx)
1048 });
1049 }
1050
1051 if let Some(remote) = self.as_remote_mut() {
1052 // Wake up all futures currently waiting on a buffer to get opened,
1053 // to give them a chance to fail now that we've disconnected.
1054 remote.remote_buffer_listeners.clear()
1055 }
1056 }
1057
1058 pub fn shared(&mut self, remote_id: u64, downstream_client: AnyProtoClient, _cx: &mut App) {
1059 self.downstream_client = Some((downstream_client, remote_id));
1060 }
1061
1062 pub fn unshared(&mut self, _cx: &mut Context<Self>) {
1063 self.downstream_client.take();
1064 self.forget_shared_buffers();
1065 }
1066
1067 pub fn discard_incomplete(&mut self) {
1068 self.opened_buffers
1069 .retain(|_, buffer| !matches!(buffer, OpenBuffer::Operations(_)));
1070 }
1071
1072 pub fn find_search_candidates(
1073 &mut self,
1074 query: &SearchQuery,
1075 mut limit: usize,
1076 fs: Arc<dyn Fs>,
1077 cx: &mut Context<Self>,
1078 ) -> Receiver<Entity<Buffer>> {
1079 let (tx, rx) = smol::channel::unbounded();
1080 let mut open_buffers = HashSet::default();
1081 let mut unnamed_buffers = Vec::new();
1082 for handle in self.buffers() {
1083 let buffer = handle.read(cx);
1084 if let Some(entry_id) = buffer.entry_id(cx) {
1085 open_buffers.insert(entry_id);
1086 } else {
1087 limit = limit.saturating_sub(1);
1088 unnamed_buffers.push(handle)
1089 };
1090 }
1091
1092 const MAX_CONCURRENT_BUFFER_OPENS: usize = 64;
1093 let project_paths_rx = self
1094 .worktree_store
1095 .update(cx, |worktree_store, cx| {
1096 worktree_store.find_search_candidates(query.clone(), limit, open_buffers, fs, cx)
1097 })
1098 .chunks(MAX_CONCURRENT_BUFFER_OPENS);
1099
1100 cx.spawn(async move |this, cx| {
1101 for buffer in unnamed_buffers {
1102 tx.send(buffer).await.ok();
1103 }
1104
1105 let mut project_paths_rx = pin!(project_paths_rx);
1106 while let Some(project_paths) = project_paths_rx.next().await {
1107 let buffers = this.update(cx, |this, cx| {
1108 project_paths
1109 .into_iter()
1110 .map(|project_path| this.open_buffer(project_path, cx))
1111 .collect::<Vec<_>>()
1112 })?;
1113 for buffer_task in buffers {
1114 if let Some(buffer) = buffer_task.await.log_err() {
1115 if tx.send(buffer).await.is_err() {
1116 return anyhow::Ok(());
1117 }
1118 }
1119 }
1120 }
1121 anyhow::Ok(())
1122 })
1123 .detach();
1124 rx
1125 }
1126
1127 fn on_buffer_event(
1128 &mut self,
1129 buffer: Entity<Buffer>,
1130 event: &BufferEvent,
1131 cx: &mut Context<Self>,
1132 ) {
1133 match event {
1134 BufferEvent::FileHandleChanged => {
1135 if let Some(local) = self.as_local_mut() {
1136 local.buffer_changed_file(buffer, cx);
1137 }
1138 }
1139 BufferEvent::Reloaded => {
1140 let Some((downstream_client, project_id)) = self.downstream_client.as_ref() else {
1141 return;
1142 };
1143 let buffer = buffer.read(cx);
1144 downstream_client
1145 .send(proto::BufferReloaded {
1146 project_id: *project_id,
1147 buffer_id: buffer.remote_id().to_proto(),
1148 version: serialize_version(&buffer.version()),
1149 mtime: buffer.saved_mtime().map(|t| t.into()),
1150 line_ending: serialize_line_ending(buffer.line_ending()) as i32,
1151 })
1152 .log_err();
1153 }
1154 BufferEvent::LanguageChanged => {}
1155 _ => {}
1156 }
1157 }
1158
1159 pub async fn handle_update_buffer(
1160 this: Entity<Self>,
1161 envelope: TypedEnvelope<proto::UpdateBuffer>,
1162 mut cx: AsyncApp,
1163 ) -> Result<proto::Ack> {
1164 let payload = envelope.payload.clone();
1165 let buffer_id = BufferId::new(payload.buffer_id)?;
1166 let ops = payload
1167 .operations
1168 .into_iter()
1169 .map(language::proto::deserialize_operation)
1170 .collect::<Result<Vec<_>, _>>()?;
1171 this.update(&mut cx, |this, cx| {
1172 match this.opened_buffers.entry(buffer_id) {
1173 hash_map::Entry::Occupied(mut e) => match e.get_mut() {
1174 OpenBuffer::Operations(operations) => operations.extend_from_slice(&ops),
1175 OpenBuffer::Complete { buffer, .. } => {
1176 if let Some(buffer) = buffer.upgrade() {
1177 buffer.update(cx, |buffer, cx| buffer.apply_ops(ops, cx));
1178 }
1179 }
1180 },
1181 hash_map::Entry::Vacant(e) => {
1182 e.insert(OpenBuffer::Operations(ops));
1183 }
1184 }
1185 Ok(proto::Ack {})
1186 })?
1187 }
1188
1189 pub fn register_shared_lsp_handle(
1190 &mut self,
1191 peer_id: proto::PeerId,
1192 buffer_id: BufferId,
1193 handle: OpenLspBufferHandle,
1194 ) {
1195 if let Some(shared_buffers) = self.shared_buffers.get_mut(&peer_id) {
1196 if let Some(buffer) = shared_buffers.get_mut(&buffer_id) {
1197 buffer.lsp_handle = Some(handle);
1198 return;
1199 }
1200 }
1201 debug_panic!("tried to register shared lsp handle, but buffer was not shared")
1202 }
1203
1204 pub fn handle_synchronize_buffers(
1205 &mut self,
1206 envelope: TypedEnvelope<proto::SynchronizeBuffers>,
1207 cx: &mut Context<Self>,
1208 client: Arc<Client>,
1209 ) -> Result<proto::SynchronizeBuffersResponse> {
1210 let project_id = envelope.payload.project_id;
1211 let mut response = proto::SynchronizeBuffersResponse {
1212 buffers: Default::default(),
1213 };
1214 let Some(guest_id) = envelope.original_sender_id else {
1215 anyhow::bail!("missing original_sender_id on SynchronizeBuffers request");
1216 };
1217
1218 self.shared_buffers.entry(guest_id).or_default().clear();
1219 for buffer in envelope.payload.buffers {
1220 let buffer_id = BufferId::new(buffer.id)?;
1221 let remote_version = language::proto::deserialize_version(&buffer.version);
1222 if let Some(buffer) = self.get(buffer_id) {
1223 self.shared_buffers
1224 .entry(guest_id)
1225 .or_default()
1226 .entry(buffer_id)
1227 .or_insert_with(|| SharedBuffer {
1228 buffer: buffer.clone(),
1229 lsp_handle: None,
1230 });
1231
1232 let buffer = buffer.read(cx);
1233 response.buffers.push(proto::BufferVersion {
1234 id: buffer_id.into(),
1235 version: language::proto::serialize_version(&buffer.version),
1236 });
1237
1238 let operations = buffer.serialize_ops(Some(remote_version), cx);
1239 let client = client.clone();
1240 if let Some(file) = buffer.file() {
1241 client
1242 .send(proto::UpdateBufferFile {
1243 project_id,
1244 buffer_id: buffer_id.into(),
1245 file: Some(file.to_proto(cx)),
1246 })
1247 .log_err();
1248 }
1249
1250 // TODO(max): do something
1251 // client
1252 // .send(proto::UpdateStagedText {
1253 // project_id,
1254 // buffer_id: buffer_id.into(),
1255 // diff_base: buffer.diff_base().map(ToString::to_string),
1256 // })
1257 // .log_err();
1258
1259 client
1260 .send(proto::BufferReloaded {
1261 project_id,
1262 buffer_id: buffer_id.into(),
1263 version: language::proto::serialize_version(buffer.saved_version()),
1264 mtime: buffer.saved_mtime().map(|time| time.into()),
1265 line_ending: language::proto::serialize_line_ending(buffer.line_ending())
1266 as i32,
1267 })
1268 .log_err();
1269
1270 cx.background_spawn(
1271 async move {
1272 let operations = operations.await;
1273 for chunk in split_operations(operations) {
1274 client
1275 .request(proto::UpdateBuffer {
1276 project_id,
1277 buffer_id: buffer_id.into(),
1278 operations: chunk,
1279 })
1280 .await?;
1281 }
1282 anyhow::Ok(())
1283 }
1284 .log_err(),
1285 )
1286 .detach();
1287 }
1288 }
1289 Ok(response)
1290 }
1291
1292 pub fn handle_create_buffer_for_peer(
1293 &mut self,
1294 envelope: TypedEnvelope<proto::CreateBufferForPeer>,
1295 replica_id: u16,
1296 capability: Capability,
1297 cx: &mut Context<Self>,
1298 ) -> Result<()> {
1299 let Some(remote) = self.as_remote_mut() else {
1300 return Err(anyhow!("buffer store is not a remote"));
1301 };
1302
1303 if let Some(buffer) =
1304 remote.handle_create_buffer_for_peer(envelope, replica_id, capability, cx)?
1305 {
1306 self.add_buffer(buffer, cx)?;
1307 }
1308
1309 Ok(())
1310 }
1311
1312 pub async fn handle_update_buffer_file(
1313 this: Entity<Self>,
1314 envelope: TypedEnvelope<proto::UpdateBufferFile>,
1315 mut cx: AsyncApp,
1316 ) -> Result<()> {
1317 let buffer_id = envelope.payload.buffer_id;
1318 let buffer_id = BufferId::new(buffer_id)?;
1319
1320 this.update(&mut cx, |this, cx| {
1321 let payload = envelope.payload.clone();
1322 if let Some(buffer) = this.get_possibly_incomplete(buffer_id) {
1323 let file = payload.file.ok_or_else(|| anyhow!("invalid file"))?;
1324 let worktree = this
1325 .worktree_store
1326 .read(cx)
1327 .worktree_for_id(WorktreeId::from_proto(file.worktree_id), cx)
1328 .ok_or_else(|| anyhow!("no such worktree"))?;
1329 let file = File::from_proto(file, worktree, cx)?;
1330 let old_file = buffer.update(cx, |buffer, cx| {
1331 let old_file = buffer.file().cloned();
1332 let new_path = file.path.clone();
1333 buffer.file_updated(Arc::new(file), cx);
1334 if old_file
1335 .as_ref()
1336 .map_or(true, |old| *old.path() != new_path)
1337 {
1338 Some(old_file)
1339 } else {
1340 None
1341 }
1342 });
1343 if let Some(old_file) = old_file {
1344 cx.emit(BufferStoreEvent::BufferChangedFilePath { buffer, old_file });
1345 }
1346 }
1347 if let Some((downstream_client, project_id)) = this.downstream_client.as_ref() {
1348 downstream_client
1349 .send(proto::UpdateBufferFile {
1350 project_id: *project_id,
1351 buffer_id: buffer_id.into(),
1352 file: envelope.payload.file,
1353 })
1354 .log_err();
1355 }
1356 Ok(())
1357 })?
1358 }
1359
1360 pub async fn handle_save_buffer(
1361 this: Entity<Self>,
1362 envelope: TypedEnvelope<proto::SaveBuffer>,
1363 mut cx: AsyncApp,
1364 ) -> Result<proto::BufferSaved> {
1365 let buffer_id = BufferId::new(envelope.payload.buffer_id)?;
1366 let (buffer, project_id) = this.update(&mut cx, |this, _| {
1367 anyhow::Ok((
1368 this.get_existing(buffer_id)?,
1369 this.downstream_client
1370 .as_ref()
1371 .map(|(_, project_id)| *project_id)
1372 .context("project is not shared")?,
1373 ))
1374 })??;
1375 buffer
1376 .update(&mut cx, |buffer, _| {
1377 buffer.wait_for_version(deserialize_version(&envelope.payload.version))
1378 })?
1379 .await?;
1380 let buffer_id = buffer.update(&mut cx, |buffer, _| buffer.remote_id())?;
1381
1382 if let Some(new_path) = envelope.payload.new_path {
1383 let new_path = ProjectPath::from_proto(new_path);
1384 this.update(&mut cx, |this, cx| {
1385 this.save_buffer_as(buffer.clone(), new_path, cx)
1386 })?
1387 .await?;
1388 } else {
1389 this.update(&mut cx, |this, cx| this.save_buffer(buffer.clone(), cx))?
1390 .await?;
1391 }
1392
1393 buffer.update(&mut cx, |buffer, _| proto::BufferSaved {
1394 project_id,
1395 buffer_id: buffer_id.into(),
1396 version: serialize_version(buffer.saved_version()),
1397 mtime: buffer.saved_mtime().map(|time| time.into()),
1398 })
1399 }
1400
1401 pub async fn handle_close_buffer(
1402 this: Entity<Self>,
1403 envelope: TypedEnvelope<proto::CloseBuffer>,
1404 mut cx: AsyncApp,
1405 ) -> Result<()> {
1406 let peer_id = envelope.sender_id;
1407 let buffer_id = BufferId::new(envelope.payload.buffer_id)?;
1408 this.update(&mut cx, |this, cx| {
1409 if let Some(shared) = this.shared_buffers.get_mut(&peer_id) {
1410 if shared.remove(&buffer_id).is_some() {
1411 cx.emit(BufferStoreEvent::SharedBufferClosed(peer_id, buffer_id));
1412 if shared.is_empty() {
1413 this.shared_buffers.remove(&peer_id);
1414 }
1415 return;
1416 }
1417 }
1418 debug_panic!(
1419 "peer_id {} closed buffer_id {} which was either not open or already closed",
1420 peer_id,
1421 buffer_id
1422 )
1423 })
1424 }
1425
1426 pub async fn handle_buffer_saved(
1427 this: Entity<Self>,
1428 envelope: TypedEnvelope<proto::BufferSaved>,
1429 mut cx: AsyncApp,
1430 ) -> Result<()> {
1431 let buffer_id = BufferId::new(envelope.payload.buffer_id)?;
1432 let version = deserialize_version(&envelope.payload.version);
1433 let mtime = envelope.payload.mtime.clone().map(|time| time.into());
1434 this.update(&mut cx, move |this, cx| {
1435 if let Some(buffer) = this.get_possibly_incomplete(buffer_id) {
1436 buffer.update(cx, |buffer, cx| {
1437 buffer.did_save(version, mtime, cx);
1438 });
1439 }
1440
1441 if let Some((downstream_client, project_id)) = this.downstream_client.as_ref() {
1442 downstream_client
1443 .send(proto::BufferSaved {
1444 project_id: *project_id,
1445 buffer_id: buffer_id.into(),
1446 mtime: envelope.payload.mtime,
1447 version: envelope.payload.version,
1448 })
1449 .log_err();
1450 }
1451 })
1452 }
1453
1454 pub async fn handle_buffer_reloaded(
1455 this: Entity<Self>,
1456 envelope: TypedEnvelope<proto::BufferReloaded>,
1457 mut cx: AsyncApp,
1458 ) -> Result<()> {
1459 let buffer_id = BufferId::new(envelope.payload.buffer_id)?;
1460 let version = deserialize_version(&envelope.payload.version);
1461 let mtime = envelope.payload.mtime.clone().map(|time| time.into());
1462 let line_ending = deserialize_line_ending(
1463 proto::LineEnding::from_i32(envelope.payload.line_ending)
1464 .ok_or_else(|| anyhow!("missing line ending"))?,
1465 );
1466 this.update(&mut cx, |this, cx| {
1467 if let Some(buffer) = this.get_possibly_incomplete(buffer_id) {
1468 buffer.update(cx, |buffer, cx| {
1469 buffer.did_reload(version, line_ending, mtime, cx);
1470 });
1471 }
1472
1473 if let Some((downstream_client, project_id)) = this.downstream_client.as_ref() {
1474 downstream_client
1475 .send(proto::BufferReloaded {
1476 project_id: *project_id,
1477 buffer_id: buffer_id.into(),
1478 mtime: envelope.payload.mtime,
1479 version: envelope.payload.version,
1480 line_ending: envelope.payload.line_ending,
1481 })
1482 .log_err();
1483 }
1484 })
1485 }
1486
1487 pub fn reload_buffers(
1488 &self,
1489 buffers: HashSet<Entity<Buffer>>,
1490 push_to_history: bool,
1491 cx: &mut Context<Self>,
1492 ) -> Task<Result<ProjectTransaction>> {
1493 if buffers.is_empty() {
1494 return Task::ready(Ok(ProjectTransaction::default()));
1495 }
1496 match &self.state {
1497 BufferStoreState::Local(this) => this.reload_buffers(buffers, push_to_history, cx),
1498 BufferStoreState::Remote(this) => this.reload_buffers(buffers, push_to_history, cx),
1499 }
1500 }
1501
1502 async fn handle_reload_buffers(
1503 this: Entity<Self>,
1504 envelope: TypedEnvelope<proto::ReloadBuffers>,
1505 mut cx: AsyncApp,
1506 ) -> Result<proto::ReloadBuffersResponse> {
1507 let sender_id = envelope.original_sender_id().unwrap_or_default();
1508 let reload = this.update(&mut cx, |this, cx| {
1509 let mut buffers = HashSet::default();
1510 for buffer_id in &envelope.payload.buffer_ids {
1511 let buffer_id = BufferId::new(*buffer_id)?;
1512 buffers.insert(this.get_existing(buffer_id)?);
1513 }
1514 Ok::<_, anyhow::Error>(this.reload_buffers(buffers, false, cx))
1515 })??;
1516
1517 let project_transaction = reload.await?;
1518 let project_transaction = this.update(&mut cx, |this, cx| {
1519 this.serialize_project_transaction_for_peer(project_transaction, sender_id, cx)
1520 })?;
1521 Ok(proto::ReloadBuffersResponse {
1522 transaction: Some(project_transaction),
1523 })
1524 }
1525
1526 pub fn create_buffer_for_peer(
1527 &mut self,
1528 buffer: &Entity<Buffer>,
1529 peer_id: proto::PeerId,
1530 cx: &mut Context<Self>,
1531 ) -> Task<Result<()>> {
1532 let buffer_id = buffer.read(cx).remote_id();
1533 let shared_buffers = self.shared_buffers.entry(peer_id).or_default();
1534 if shared_buffers.contains_key(&buffer_id) {
1535 return Task::ready(Ok(()));
1536 }
1537 shared_buffers.insert(
1538 buffer_id,
1539 SharedBuffer {
1540 buffer: buffer.clone(),
1541 lsp_handle: None,
1542 },
1543 );
1544
1545 let Some((client, project_id)) = self.downstream_client.clone() else {
1546 return Task::ready(Ok(()));
1547 };
1548
1549 cx.spawn(async move |this, cx| {
1550 let Some(buffer) = this.update(cx, |this, _| this.get(buffer_id))? else {
1551 return anyhow::Ok(());
1552 };
1553
1554 let operations = buffer.update(cx, |b, cx| b.serialize_ops(None, cx))?;
1555 let operations = operations.await;
1556 let state = buffer.update(cx, |buffer, cx| buffer.to_proto(cx))?;
1557
1558 let initial_state = proto::CreateBufferForPeer {
1559 project_id,
1560 peer_id: Some(peer_id),
1561 variant: Some(proto::create_buffer_for_peer::Variant::State(state)),
1562 };
1563
1564 if client.send(initial_state).log_err().is_some() {
1565 let client = client.clone();
1566 cx.background_spawn(async move {
1567 let mut chunks = split_operations(operations).peekable();
1568 while let Some(chunk) = chunks.next() {
1569 let is_last = chunks.peek().is_none();
1570 client.send(proto::CreateBufferForPeer {
1571 project_id,
1572 peer_id: Some(peer_id),
1573 variant: Some(proto::create_buffer_for_peer::Variant::Chunk(
1574 proto::BufferChunk {
1575 buffer_id: buffer_id.into(),
1576 operations: chunk,
1577 is_last,
1578 },
1579 )),
1580 })?;
1581 }
1582 anyhow::Ok(())
1583 })
1584 .await
1585 .log_err();
1586 }
1587 Ok(())
1588 })
1589 }
1590
1591 pub fn forget_shared_buffers(&mut self) {
1592 self.shared_buffers.clear();
1593 }
1594
1595 pub fn forget_shared_buffers_for(&mut self, peer_id: &proto::PeerId) {
1596 self.shared_buffers.remove(peer_id);
1597 }
1598
1599 pub fn update_peer_id(&mut self, old_peer_id: &proto::PeerId, new_peer_id: proto::PeerId) {
1600 if let Some(buffers) = self.shared_buffers.remove(old_peer_id) {
1601 self.shared_buffers.insert(new_peer_id, buffers);
1602 }
1603 }
1604
1605 pub fn has_shared_buffers(&self) -> bool {
1606 !self.shared_buffers.is_empty()
1607 }
1608
1609 pub fn create_local_buffer(
1610 &mut self,
1611 text: &str,
1612 language: Option<Arc<Language>>,
1613 cx: &mut Context<Self>,
1614 ) -> Entity<Buffer> {
1615 let buffer = cx.new(|cx| {
1616 Buffer::local(text, cx)
1617 .with_language(language.unwrap_or_else(|| language::PLAIN_TEXT.clone()), cx)
1618 });
1619
1620 self.add_buffer(buffer.clone(), cx).log_err();
1621 let buffer_id = buffer.read(cx).remote_id();
1622
1623 let this = self
1624 .as_local_mut()
1625 .expect("local-only method called in a non-local context");
1626 if let Some(file) = File::from_dyn(buffer.read(cx).file()) {
1627 this.local_buffer_ids_by_path.insert(
1628 ProjectPath {
1629 worktree_id: file.worktree_id(cx),
1630 path: file.path.clone(),
1631 },
1632 buffer_id,
1633 );
1634
1635 if let Some(entry_id) = file.entry_id {
1636 this.local_buffer_ids_by_entry_id
1637 .insert(entry_id, buffer_id);
1638 }
1639 }
1640 buffer
1641 }
1642
1643 pub fn deserialize_project_transaction(
1644 &mut self,
1645 message: proto::ProjectTransaction,
1646 push_to_history: bool,
1647 cx: &mut Context<Self>,
1648 ) -> Task<Result<ProjectTransaction>> {
1649 if let Some(this) = self.as_remote_mut() {
1650 this.deserialize_project_transaction(message, push_to_history, cx)
1651 } else {
1652 debug_panic!("not a remote buffer store");
1653 Task::ready(Err(anyhow!("not a remote buffer store")))
1654 }
1655 }
1656
1657 pub fn wait_for_remote_buffer(
1658 &mut self,
1659 id: BufferId,
1660 cx: &mut Context<BufferStore>,
1661 ) -> Task<Result<Entity<Buffer>>> {
1662 if let Some(this) = self.as_remote_mut() {
1663 this.wait_for_remote_buffer(id, cx)
1664 } else {
1665 debug_panic!("not a remote buffer store");
1666 Task::ready(Err(anyhow!("not a remote buffer store")))
1667 }
1668 }
1669
1670 pub fn serialize_project_transaction_for_peer(
1671 &mut self,
1672 project_transaction: ProjectTransaction,
1673 peer_id: proto::PeerId,
1674 cx: &mut Context<Self>,
1675 ) -> proto::ProjectTransaction {
1676 let mut serialized_transaction = proto::ProjectTransaction {
1677 buffer_ids: Default::default(),
1678 transactions: Default::default(),
1679 };
1680 for (buffer, transaction) in project_transaction.0 {
1681 self.create_buffer_for_peer(&buffer, peer_id, cx)
1682 .detach_and_log_err(cx);
1683 serialized_transaction
1684 .buffer_ids
1685 .push(buffer.read(cx).remote_id().into());
1686 serialized_transaction
1687 .transactions
1688 .push(language::proto::serialize_transaction(&transaction));
1689 }
1690 serialized_transaction
1691 }
1692}
1693
1694impl OpenBuffer {
1695 fn upgrade(&self) -> Option<Entity<Buffer>> {
1696 match self {
1697 OpenBuffer::Complete { buffer, .. } => buffer.upgrade(),
1698 OpenBuffer::Operations(_) => None,
1699 }
1700 }
1701}
1702
1703fn is_not_found_error(error: &anyhow::Error) -> bool {
1704 error
1705 .root_cause()
1706 .downcast_ref::<io::Error>()
1707 .is_some_and(|err| err.kind() == io::ErrorKind::NotFound)
1708}